sys.server_role_members (Transact-SQL)
Returns one row for each member of each fixed server role.
Column name  | 
Data type  | 
Description  | 
|---|---|---|
role_principal_id  | 
int  | 
Server-Principal ID of the role.  | 
member_principal_id  | 
int  | 
Server-Principal ID of the member.  | 
Permissions
In SQL Server 2005 and later versions, the visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.
See Also